Think I broke my AR...help?

[kwelz]

I have rifles that have gone thousands of rounds between cleaning and never had this issue. That includes that use of Steel cased lacquered stuff. That is why I asked. Chrome lining does make a difference in the chamber as does the actual cut of the chamber. It is true 5.56, etc. That is why I ask who made the barrel. BM for instance is known for tight chambers that can contribute to problems like this.

Overall though sounds like a fluke.

 

[61chalk]

Thanks for the update, clean that bore once in awhile an you should be fine.
So far every jam from someone else I've seen said the same thing, that they
had shot hundreds of rounds, but had never used the brush to clean the bore
area. After almost 30 yrs. of shooting my AR never had the problem yet. But
I shoot mostly all re-load brass, the Wolf steel didn't run good in mine....seems
you had better luck...Don't know if its true, but have heard others say that Wolf
is very dirty....?

 

[HOLY DIVER]

that lacquer build up in a chamber will do this every time. if you must shoot steel case ammo silver bear is zinc plated,i don't shoot steel case anything in my AR's I shoot mostly PMC bronze i get 1000rds for $329

 

[MrCleanOK]

Proper application of immediate action followed by remedial action would have fixed this right away.

IMMEDIATE ACTION
3-2. Immediate action involves quickly applying a possible correction to reduce a stoppage without
performing troubleshooting procedures to determine the actual cause. Apply immediate action only once
for a stoppage. If the rifle fails to fire a second time for the same malfunction, inspect the weapon to
determine the cause of the stoppage or malfunction, and take the appropriate remedial action. The key word
SPORTS will help the firer remember the steps for immediate action:
(1) Slap gently upward on the magazine to ensure that it is fully seated and that the magazine
follower is not jammed.
NOTE: When slapping up on the magazine, be careful not to knock a round out of the magazine
into the line of the bolt carrier, causing more problems. Slap only hard enough to ensure that the
magazine is fully seated. Ensure that the magazine is locked into place by quickly pulling down
on the magazine.
(2) Pull the charging handle fully to the rear.
(3) Observe the ejection of a live round or expended cartridge.
NOTE: If the weapon fails to eject a cartridge, perform remedial action.
(4) Release the charging handle; do not ride it forward.
(5) Tap the forward assist assembly to ensure that the bolt is closed.
(6) Squeeze the trigger and try to fire the rifle.

Immediate action should be performed from start to finish without stopping. Don't pick up an ejected round off the ground. Don't try to sort out the problem. Just perform SPORTS to see if the gun will function again. Upon performing immediate action in this case, the rifle would have exhibited the same malfunction: feeding another live round behind the fired case stuck in the chamber. That would have been the time for remedial action.

REMEDIAL ACTION
3-3. Remedial action is the continuing effort to determine the cause of a stoppage or malfunction and
attempt to clear the stoppage once it has been identified. To apply the corrective steps for remedial action—
(1) Try to place the weapon on SAFE.
NOTE: A bolt override may not allow the weapon to be placed on SAFE.
(2) Remove the magazine.
(3) Lock the bolt to the rear.
(4) Place the weapon on SAFE (if not already done).

Upon safing the weapon and locking the bolt to the rear, that would have been the time to inspect for the cause of the malfunction. Give the chamber area a visual and tactile (stick a finger in there) check. Inspect magazine feed lips for damage. You'd have found a fired casing stuck in your chamber and been able fix it instead of locking your bolt group forward and then having to guess why it's stuck.

FAILURE TO EXTRACT
3-15. A failure to extract results when the cartridge case remains in the chamber of the rifle. The bolt and
bolt carrier might move rearward only a short distance, but more commonly, the bolt and bolt carrier recoil
fully to the rear, leaving the cartridge case in the chamber. A live round is then forced into the base of the
cartridge case as the bolt returns in the next feed cycle.
WARNING
A failure to extract is an extremely serious malfunction, requiring
the use of tools to clear. A live round could be left in the chamber
and accidentally discharged. If a second live round is fed into the
primer of the chambered live round, the rifle could explode and
cause personal injury. This malfunction must be properly
identified and reported.
Ejection failures should not be reported as extraction failures.
Probable Cause
3-16. Short recoil cycles and fouled or corroded rifle chambers are the most common causes of failures to
extract. A damaged extractor or a weak or broken extractor spring can also cause this malfunction.
Corrective Action
3-17. This malfunction is one of the hardest to clear; the severity of the failure determines the corrective
action procedures.
NOTE: If the bolt has moved rearward far enough to strip a live round from the magazine in its
forward motion, the bolt and bolt carrier must be locked to the rear.
3-18. With the bolt locked to the rear and the weapon on SAFE, perform the following actions:
(1) Remove the magazine and all loose rounds.
(2) Tap the weapon's buttstock on a hard surface to cause the cartridge to fall out of the chamber.
3-19. However, if the cartridge case is ruptured, it can be seized. When this occurs, perform the following
actions:
(1) Insert a cleaning rod into the bore from the muzzle end.
(2) Force the cartridge case from the chamber by tapping the cleaning rod against the inside base of
the fired cartridge.
3-20. If cleaning and inspecting the mechanism and chamber reveals no defects but failures to extract
persist, the extractor and extractor spring should be replaced. If the chamber surface is damaged, the entire
barrel must be replaced.

Without a solid cleaning rod, pogoing is a good way to clear a failure to extract. As has been said, close the bolt on the stuck round. Collapse the stock to its shortest position, if applicable. Firmly hold the rifle by the handguard. Simultaneously pull forcefully on the charging handle while jarring the butt against the ground. The stuck case will pop out, or your extractor will lose hold of the case rim like it did the first time. In that case, you're right back where you started from. Go home and get a solid rod to tap the case out with.

To make this less likely in the future, I would suggest you upgrade your extractor spring if you have not already done so. Best $5 you can spend on your bolt.

SOURCE: US Army FM 3-22.9, 12 August 2008

 

[Mags]

Lol, Chrome lined, like that matters just AR elitists mumbo jumbo LOL.